[Zope3-dev] Re: keeping attributes abstract

[Marko Mikulicic]

On 09.03.2006., at 11:43, Sam Stainsby wrote:

> On Thu, 09 Mar 2006 04:29:12 -0500, Benji York wrote:
>
>
>> class Foo(Persistent):
>>      implements(IFooB)
>>
>>      @apply
>>      def bar(self):
>>          doc = """The bar attribute"""
>>
>>          def fset(self, bar):
>>              if bar is None:
>>                  self._bar = 47
>>              else:
>>                  self._bar = bar
>>
>>          def fget(self):
>>              return self._bar * 44
>>
>>          return property(**locals)
>
> Ah, good ... the situation is better than I thought, although the  
> code is
> a little complex than I would like to see. How would you go about
> overriding the accessor or mutator in a subclass?


class Foo(Persistent):
    implements(IFooB)

   def setBar(self, bar):
        ....

   def getBar(self):
        ....

   bar = property(getBar, setBar)


of course a subclasser of Foo needs to know that he is subclassing a  
Foo and not simply a IFooB, however this is mostly a documentation issue